def test_category_three_deep_as_grandchild(self):
child_category = Category(name='Child category')
child_category.parent = self.category
child_category.save()
grand_child_category = Category(name='Grandchild category')
grand_child_category.parent = child_category
self.assertRaises(ValidationError, grand_child_category.save)
def test_category_two_deep(self):
child_category = Category(name='Child category')
child_category.parent = self.category
child_category.save()
self.category.refresh_from_db()
self.assertEqual(1, self.category.children.count())
